Air dam



FIG. 1 is a front elevational view of an air dam showing my new design.

FIG. 2 is a top plan view.

FIG. 3 is a side elevational view, and

FIG. 4 is a perspective view.

The portions of the vehicle shown in dash lines in FIGS. 1, 2 and 3 are for illustrative purposes only. 

The ornamental design for an air dam, as shown and described. 